/Engine/Source/Runtime/Engine/Public/PluginBlueprintLibrary.h
Get the list of extra directories added by the project that are recursively searched for plugins.
The additional project filesystem plugin search paths.
static const [TArray](API\Runtime\Core\Containers\TArray)< [FString](API\Runtime\Core\Containers\FString) > & GetAdditionalProjectPluginSearchPaths()